Stackable base for mattress assembly



FIG. 1 is a top perspective view of the base;

FIG. 2 is a bottom perspective view of the base of FIG. 1;

FIG. 3 is a top side view of the base of FIG. 1;

FIG. 4 is a bottom side view of the base of FIG. 1;

FIG. 5 is a front and rear view of the base of FIG. 1; and,

FIG. 6 is a left and right side view of the base of FIG. 1.

The broken lines in FIGS. 1-5 are for illustrative purposes only and do not form part of the claimed design. 

CLAIM The ornamental design for stackable base for mattress assembly, as shown and described. 